[compiler] Improve snap usability (facebook#35537)

A whole bunch of changes to snap aimed at making it more usable for
humans and agents. Here's the new CLI interface:

```
node dist/main.js --help
Options:
      --version         Show version number                            [boolean]
      --sync            Run compiler in main thread (instead of using worker
                        threads or subprocesses). Defaults to false.
                                                      [boolean] [default: false]
      --worker-threads  Run compiler in worker threads (instead of
                        subprocesses). Defaults to true.
                                                       [boolean] [default: true]
      --help            Show help                                      [boolean]
  -w, --watch           Run compiler in watch mode, re-running after changes
                                                                       [boolean]
  -u, --update          Update fixtures                                [boolean]
  -p, --pattern         Optional glob pattern to filter fixtures (e.g.,
                        "error.*", "use-memo")                          [string]
  -d, --debug           Enable debug logging to print HIR for each pass[boolean]
```

Key changes:
* Added abbreviations for common arguments
* No more testfilter.txt! Filtering/debugging works more like Jest, see
below.
* The `--debug` flag (`-d`) controls whether to emit debug information.
In watch mode, this flag sets the initial debug value, and it can be
toggled by pressing the 'd' key while watching.
* The `--pattern` flag (`-p`) sets a filter pattern. In watch mode, this
flag sets the initial filter. It can be changed by pressing 'p' and
typing a new pattern, or pressing 'a' to switch to running all tests.
* As before, we only actually enable debugging if debug mode is enabled
_and_ there is only one test selected.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35537).
* facebook#35607
* facebook#35298
* facebook#35596
* facebook#35573
* facebook#35595
* facebook#35539
* __->__ facebook#35537
* facebook#35523

DiffTrain build for [03613cd](facebook@03613cd)

Author: pull[bot]

compiled/facebook-www/REVISION

@@ -1 +1 @@
-94913cbffeff60c862ef818ca62cdc329dc2fd57
+03613cd68c9e1d7ec5cb1eceb91f27f1935a7b8b

compiled/facebook-www/REVISION_TRANSFORMS

@@ -1 +1 @@
-94913cbffeff60c862ef818ca62cdc329dc2fd57
+03613cd68c9e1d7ec5cb1eceb91f27f1935a7b8b

compiled/facebook-www/React-dev.classic.js

@@ -1493,7 +1493,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.3.0-www-classic-94913cbf-20260123";
+    exports.version = "19.3.0-www-classic-03613cd6-20260123";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-dev.modern.js

@@ -1493,7 +1493,7 @@ __DEV__ &&
     exports.useTransition = function () {
       return resolveDispatcher().useTransition();
     };
-    exports.version = "19.3.0-www-modern-94913cbf-20260123";
+    exports.version = "19.3.0-www-modern-03613cd6-20260123";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-prod.classic.js

@@ -610,4 +610,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.3.0-www-classic-94913cbf-20260123";
+exports.version = "19.3.0-www-classic-03613cd6-20260123";

compiled/facebook-www/React-prod.modern.js

@@ -610,4 +610,4 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.3.0-www-modern-94913cbf-20260123";
+exports.version = "19.3.0-www-modern-03613cd6-20260123";

compiled/facebook-www/React-profiling.classic.js

@@ -614,7 +614,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.3.0-www-classic-94913cbf-20260123";
+exports.version = "19.3.0-www-classic-03613cd6-20260123";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/React-profiling.modern.js

@@ -614,7 +614,7 @@ exports.useSyncExternalStore = function (
 exports.useTransition = function () {
   return ReactSharedInternals.H.useTransition();
 };
-exports.version = "19.3.0-www-modern-94913cbf-20260123";
+exports.version = "19.3.0-www-modern-03613cd6-20260123";
 "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
   "function" ===
     typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/ReactART-dev.classic.js

@@ -20491,10 +20491,10 @@ __DEV__ &&
     (function () {
       var internals = {
         bundleType: 1,
-        version: "19.3.0-www-classic-94913cbf-20260123",
+        version: "19.3.0-www-classic-03613cd6-20260123",
         rendererPackageName: "react-art",
         currentDispatcherRef: ReactSharedInternals,
-        reconcilerVersion: "19.3.0-www-classic-94913cbf-20260123"
+        reconcilerVersion: "19.3.0-www-classic-03613cd6-20260123"
       };
       internals.overrideHookState = overrideHookState;
       internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -20529,7 +20529,7 @@ __DEV__ &&
     exports.Shape = Shape;
     exports.Surface = Surface;
     exports.Text = Text;
-    exports.version = "19.3.0-www-classic-94913cbf-20260123";
+    exports.version = "19.3.0-www-classic-03613cd6-20260123";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&

compiled/facebook-www/ReactART-dev.modern.js

@@ -20262,10 +20262,10 @@ __DEV__ &&
     (function () {
       var internals = {
         bundleType: 1,
-        version: "19.3.0-www-modern-94913cbf-20260123",
+        version: "19.3.0-www-modern-03613cd6-20260123",
         rendererPackageName: "react-art",
         currentDispatcherRef: ReactSharedInternals,
-        reconcilerVersion: "19.3.0-www-modern-94913cbf-20260123"
+        reconcilerVersion: "19.3.0-www-modern-03613cd6-20260123"
       };
       internals.overrideHookState = overrideHookState;
       internals.overrideHookStateDeletePath = overrideHookStateDeletePath;
@@ -20300,7 +20300,7 @@ __DEV__ &&
     exports.Shape = Shape;
     exports.Surface = Surface;
     exports.Text = Text;
-    exports.version = "19.3.0-www-modern-94913cbf-20260123";
+    exports.version = "19.3.0-www-modern-03613cd6-20260123";
     "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
       "function" ===
         typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&